Nailing machine



Nov. 8, 1966 v c. A. DAVIS NAILING MACHINE 4 Sheets-Sheet l Original Filed April 18, 1965 um O T. N E V m ATTORNEYS C. A. DAVIS NAILING MACHINE Nov. 8, 1966 4 Sheets-Sheet 2 Original Filed April 18, 1963 FIG. 9

I INVENTOR ATTORN EYS Nov. 8, 1966 c. A. DAVIS 3,283,984

NAILING MACHINE Original Filed April 18. 1963 4 Sheets-Sheet 3 FIG. 5

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INVENTOR. @iw @am ATTORNEY NOV 8, 1966v c. A. DAvls 3,283,984

NAHJNGl MACHINE Original Filed April 18, 1965 4 Sheets-Sheet 4 IUE Gage mm Mm-wm United States Patent O 4 Ciasms. (ci. 227-30) This is a continuation of application Serial No. 274,002, led April 18, 1963, now abandoned.

The present invention relates to a multiple feed nailing machine and in particular to a nailing machine designed to gang tack or nail members to the heel portion of a partially formed shoe, when the partially formed shoe is on the last.

In the manufacture of certain shoes, particularly welt shoes, it is desirable to tack members such as a dutchman or rand to the partially formed shoe on the last prior to the attachment of the outsole. It is also desirable in certain constructions to secure members such as spring heel wedgies or bases to the insole while the insole is on the shoe last.

Heretofore attachments of such members has been accomplished by forming holes through the member to be attached by an awl or the like. The member is then positioned adjacent the last-mounted insole and then a cut nail having a duck bill point is driven through each awl formed hole and the insole into impacting engagement against the metal heel plate of the last. By applying sufficient force to the nail the duck bill point of the nail is bent -over to secure the member and the insole together. In this process these cut nails are impacted sequentially to secure them one after the other to the member and insole. This sequential operation permits alignment of the cut nail with the preformed hole in the member.

It is an object of the present invention to provide a method by which members of the type described may be secured to a partially formed shoe on a last by a gang nailing technique. In this technique, diamond pointed nails formed of wire as distinguished from the duck bill cut nails are used. These diamond pointed wire nails are sharply pointed permitting the nail to form its own hole in the member, thereby eliminating the requirement of a preformed hole. Additionally, the present invention provides improved methods for securing members to insoles by nailing techniques, whereby a plurality of diamond pointed wire nails are driven through the member and insole into impacting contact with the heel plate of the last so as to cause the points of the `wire nails to simultaneously and uniformly bend to secure the member to the partially formed shoe on the last.

It is also an object of the present invention to provide a means particularly suitable for rapid and efficient nailin-g of members using gang nailing techniques for securing a member to the heel portion of an insole while the insole is secured to a last.

A further object of the present invention is to provide a relatively inexpensive nailing machine for securing members to a partially formed shoe on a last which is easy to maintain and certain of operation.

A further object of the present invention is to provide a machine for practicing the technique described above rapidly, eiciently and with substantial economy.

In the present invention there is provided a nailing machine having an adjustable support for positioning and securing a member such as a heel base or dutchman to be secured to a partially formed shoe while positioned on a last. Theh support is positioned below a last engaging member adapted to engage and secure a shoe last against `upward movement and above a nail driving machanism adapted to drive upwardly pointed nails. The last engaging member is interengaged with a drive means and a drive source for vertical movement. The nail driving mechanism is interengaged with means for driving nails upwardly. A nail feed mechanism supplies nails in groups to the nail driving mechanism. Means for synchronous operation of the last engaging mechanism, adjustable support, and nail driving mechanism, cause nails to be fed to the nail driving mechanism in a group and thereafter these nails are driven into the member and partially formed shoe on the last to secure the two together.

These and other objects and advantages of the present invention will be more clearly understood when considered in conjunction with the accompanying drawings in which:

FIG. l is a side perspective view of a machine showing a preferred embodiment of the invention;

FIG. 2 is a fragmentary perspective of a portion of the drive mechanism;

FIG. 3 is a fragmentary elevational detail of a clutch actuating mechanism associated with the drive mechamsm;

FIG. 4 is a fragmentary perspective of the member support means;

FIG. 5 is a cross-sectional fragmentary detail of the nail transfer mechanism, nail driving mechanism, member support and last engaging member;

FIG. 5A is a fragmentary View of a `detail of the mechanism shown in FIG. 5, looking from the left;

FIG. 6 is a fragmentary detail of the porti-on of the elements shown in FIG. 5 in sequential operation;

FIG. 7 is a schematic diagram of a suitable actuating system for use with this invention;

FIG. 8 is a cross-sectional somewhat schematic view of a partially formed shoe on a last for illustrating the present invention;

FIG. 9 is a perspective View of a diamond pointed wire nail; and

FIG. 10 is a fragmentary bottom view of the construction shown in FIG. 5.

This nailing machine is particularly useful in tacking members such as heel bases, dutchmans, rands, spring heel wedgies or the like to the heel portion -of an upper while the upper is on the last. In using the machine an upper `on a last is placed in contact with the member while the member is in `a suitable support. The upper and member are then attached together by gang nailing the member to the periphery of the upper at the heel section with diamond pointed wire nails. The nails `are driven upwardly through the member to form their own holes, and thence through the periphery of the upper into impacting contact with the metal heel plate of the last whereby the tips of the diamond pointed nails are uniformly bent to form a secure interengagement.

Referring first to FIG. l, there is shown a frame 1, having suitably arranged sides, front and rear members for supporting the various components herein described. A rocking beam 2 is mounted intermediate its ends 3 and 4 by a journal S in turn secured to the frame. The end 4 of the rocking beam is pivotally linked by a pin and journal arrangement to the upper end of the drive shaft 6. This drive shaft is journaled in bearings 7 and 8 for vertical movement and may if desired be formed of a plurality of sections interconnected by an adjusting nut 9 for varying the effective length of the drive shaft 6. The lower end of the drive shaft 6 supports a last engaging member 10 shown in greater detail in FIG. 5. The other end 3 of the rocking beam is suitably connected by a pin and journal arrangement to a driving shaft 12 in turn suitably linked (by means not shown) to a hydraulic cylinder 11 (FIG. 7) for reciprocal rocking motion -of the beam 2 about its pivot point 5.

The last engaging member 10 shown in detail in FIG. is adapted to be moved downwardly into retaining contact with a last positioned by an operator over the member support 16 (FIGS. 1 and 4) just prior to the nailing operation. This last engaging member shown in FIG. 5 and FIG. 5A comprises a pin 10A adapted to be sesured by suitable means to the drive shaft 6. A holder 10B formed with a recess 10C is secured to the bottom of the pin 10A. A pin 10F is secured in the holder 10B and extends across the recess 10C. A plate 10E is pivotally secured to the pin 10F for rocking motion. This plate 10E is adapted to engage the top of a last and may be rocked to accommodate last variations.

Positioned below the last engaging member 19 is a nail driving mechanism 15,'(FIG. 5) and member support 16, (FIG. 4). The member support 16 comprises a clamp mechanism 17 for securing heel bases, dutchmans, rands, spring heel wedgies and the like. The clamp mechanism 17 is mounted on a slidable rectangular block 18. The slidable block 18 in turn is secured to the slide 19. The slide 19 has a generally U-shape conguration with side edges 19A beveled to engage the grooves 19B of bracket 19C. A pin 19D extends across the open end of the U- shape and provides a connecting link for the drive mechanism illustrated in FIG. 2.

The clamp mechanism 17 includes a pair of opposed arms 20 piv-oted at one end on pins 20A in turn secured to block 18. These arms are provided with intermeshed gear quadrants 20B to permit the arms to be spread univformly and simultaneously. The other ends of the arms are scalloped to provide a member receiving portion 20C within which 4an operator may place a member such as a dutchman, rand, base etc., indicated in dotted outline at 20E. A spring 20D having ends secured to the opposite arms 20 normally tensions the arms together to maintain tension on the inserted member. A stop 20F may be provided between the arms 20 to engage and prevent further rearward movement of such members. The opening arc of the arms 20 may be controlled by an adjustable stop 20G mounted on a threaded pin in turn threaded through a journal secured to block 18. Stop 20G is adapted to engage the endmost tooth of the gear quadrant 20B on one side of the arms so as to limit rotation -of the arms.

The nail driving mechanism is best illustrated in FIGS. 1 and 5. In this arrangement the block 22 is bolted or otherwise suitably secured to the frame in front of and aligned with support 16. This block is provided with a tongued recess within which the d-ie block 22A is securely positioned. This block 22A has a plurality of holes 22B through which nails are driven into the shoe construction. A stud 23, threaded or otherwise secured to the block 22A, projects downwardly through an aperture in the driver plate 24. This driver. plate carries a plurality of cylindrically shaped nail drivers 25 which are secured at their base to the driver plate 24 and project upwardly one each into the die holes 22B. The upper plate surface of these drivers are liat and are adapted to engage the heads of diamond pointed wire nails as illustrated in FIG. 8, which are deposited in the holes 22B by the nail transfer mechanism hereafter described. A spring 23A is coaxially mounted on the stud 23 and normally tensions the driver plate 24 downwardly away from the die block 22A and toward the ram head 26. This ramhead 26 is secured to the shaft 21 and is driven upwardly through this shaft, against the tension of spring 23A, when the hydraulic cylinder 20 is actuated.

The nail transfer mechanism 30, illustrated in FIGS. l, 5 and 6, includes a slide 31 mounted in a slide plate 32 (FIG. l) for reciprocal movement to and away from the die block 22A. The slide 31 has a bracket 33 secured rigidly to it by means of the screw 34. The hinged housing 35 is pivotally secured to the bracket 33 by pins 36 which pivots upwards for inspection. The hinged housing 35 comprises a top wall 38 and forward end 39 having a plurality of vertically formed holes 4t) through which nails 41 are adapted to drop head rst ou delivery through the nail transfer tubes 43 which have their lower ends secured to the upper end of the holes 40 by suitable means. A retaining plate 50 is slidably mounted in channels 50A for reciprocal movement lengthwise with respect to the housing 35. This plate 50 is formed with a projection 51 extending upwardly into the slot 52 of the housing 35. The lower surface of the plate 50 is formed with a downwardly projecting projection 57. The outermost portion of the plate 50 is provided with holes 59. The plate 50 is positioned to slide longitudinally in alignment with the upper surface of block 22 with the block adapted to engage the projection 57 on lateral movement of the plate 5t). The plate 50 in turn is adapted to slide lin relation to the housing 35 from the position shown in FIG. 5 to the position shown in FIG. 6. This plate 50 is normally spring tensioned outwardly of the housing 35 in a position illustrated in FIG. 5 by means of the spring 63 which is positioned within the slot 52 with one end engaging the projection of member 51 and the other end engaging a pin 64 fixed to the housing 35. As indicated, on actuation of the transfer mechanism, the housing 35 is slid over the upper end of block 22A. The block 22A is positioned with its upper surface 68 in horizontal alignment with the lower surface of plate 50 and is adjusted so that the edge of the block 22 will engage the projection 57 as the` transfer mechanism is moved to the left. Suitable means may be provided, if desired, to adjust the projection 57 for improved alignment of the holes 59 with the holes in the block 22A adjusting the position of the transfer mechanism in respect to the screw 34. This maybe done, for example, by using a machine screw 34 which passes through an oversized hole in bracket 33 so that bracket 33 may be adjustably clamped to slide 31 bythe machine screw 34, as illustrated in FIG. 5. When the transfer mechanism is moved to its full position toward the left as illustrated in FIG. 6, and the block 22 has engaged the boss 57, the plate 50 then slides relative to the housing 35 against the force of spring 63. As this relative sliding movement takes place, the holes 59 in the plate 50 become aligned with holes 40 and holes 22B formed in the block 22A. The nails thereupon drop into the holes 22B head first from the holes 40 where they had been deposited by the nail feed mechanism on to drivers 25.

Nails are fed to the tubes 43 head down, successively in groups with one nail in each tube by a nail feed mechanism 80. The nail feed mechanism, 'having a nail hopper 81 may be of the type illustrated in my Patent No. 3,071,291, issued January l, 1963. In this arrangement nails loosely contained within the hopper 81 are fed in groups head 4downwardly one each through tubes 43 on each actuation of the feed mechanism. Since the construction `of this mechanism may be substantially identical to the device illustrated in my Patent No. 3,071,291, reference is made thereto for a suitable construction eX- cept with respect to the actuating means for synchronously operating the feed mechanism 80.

The actuation of the nail feed 'mechanism 80, the nail transfer mechanism 30, and the reciprocal movement of the supper-U16 may be eiTected from a single power source in a selected sequential operation by means best illustrated in FIG. 2. In this arrangement a motor 81 (loca-ted in dotted outline in FIG. l) is suitably mounted on the frame. This motor is connected to a split drive shaft 82 suitably journaled by journals 83 on the frame by means of lmeshing gears 84 and achain drive 85. Onehalf of the Ishaft 82 indicated at 82 is connected to and operatively drives the shaft 86 through meshing bevel gears 87. The shaft 86 has a linkage system 88 connected at one end with -the link 89 of the system 88, piv-otally engaging the bottom of Ithe hopper S1 to reciprocate it about its forward end for agitation and feeding of .nails to the chutes and tubes 43 in a manner described in .my Patent No. 3,071,291.

The portion 82 of the shaft is normally interengaged with portions 82 iby the frictional interengaging slip clutch 90 which may be provided with a suitable shoe 91 for adjusting the frictional interengaging tension of the two halves of -the clutch.

Cam 70 is mounted on shaft portion 82 and is adapted to rotate once with each revolution of portion 82". This cam 70 engages bell crank 71 in turn connected through -interengaged links 72, 73 to the intenmeshed :gears 74. One of these gears 74 has a lever 75 secured to it with a link 76 connecting the lever 75 to the rack or bar 77. Each of these elements is suitably supported on the frame and arranged to cause the bar 77 -to move laterally once on each revolution of the cam 70. This bar 77 forms an integral portion of the nail feed mechanism 80 and on lateral movement thereof causes a group of nails to be released from the hopper and chutes with the tubes 43 as described in my Patent No. 3,071,291.

Por-tion 82 of shaft 82 also carries cam 94 which is adapted to rotate in the direction of arrow A on rotation of shaft portion 82". A `shoulder 96 on the cam 94 is adapted to engage the dog 97 which secures -the cam 94 and the shaft portion 82" against rotation. When the dog 97 is disengaged from the shoulder 96 the cam 94 rotates due to the frictional interengagement of the clutch halves of the slip clutch 90. On rotation the cam 94 will reciprocate the shaft 98 by suitable means such as through the link 99 secured at one end to the shaft 98 and at the other interengaged through a slot with the pin 100 in turn mounted at the side of the cam. The shaft 98 is supported in journal 101 and has the lever 102` secured to one end. The lever 102 engages the link 103 (FIG. 1) which is in turn connected to the slide 31 of the nail transfer mechanism 30. Reciprocation of the lever `102 will thereby -actuate the nail transfer mechanism 30 to deposit nails in the block 22A from tubes 43 once on each revolution of 4the cam 94. The other end of the shaft 98 is connected through bevel gears 104 to a shaft 105 which in turn Ireciprocates the lever 106. The lever 106 engages the pin 19D of slide 19 and thereby moves the support 16 in synchronism with movement of slide 31 forwardly and rearwardly in relation to block 22A. In this movement arms 20 are moved to and from a position directly -over block 22A with the arms adapted to position a member 20E over holes 22B when in forward position.

The dog 97 which permits intermittent rotation of the cam 94 through the slip clutch 90 is adapted to be moved laterally by means of a linkage system 110 (FIG. 3) which includes a lever `arm 111 pivoted at 112 intermediate its ends. One end of the lever 111 is connected Ito the linking arm 113 to an engaging collar 114 fixed to shaft 21. This coll-ar 114 is adapted -to permit non-engaging vertical movement of the shaft 21 without causing the linking arm 114 to move upwardly. The shaft 21 however, on downward movement is operatively interlinked with arm 113 through a lock nut 11S which engages collar |114 only as downward movement. Downward movement of the arm 113 is transmitted to the lever arm 111 which pivots .about pivot point 112. The end of lever arm 111 more remote from the linking arm 113 `is pivotally connected to the link 120. This link 120 is formed with a notch 121 adapted to engage the tongue 121A formed on the end of the dog more remote from the cam 94. The dog 97 is supported intermediate its ends by suitable means such for example as a frame or bracket 125. A spring 126 is connected at one end to the bracket 12S and at the other tothe end of the dog more remote from the cam 94. This spring tensions the engaging end of dog 97 into firm enga-gement with the surface of the cam 94. When the linkage system is actuated against the tension of spring 126, and the dog 97 is disengaged from the cam 94, the cam 94 rotates and carries with it pin 100 thereby actuating sequentially 'the nail transfer mechanism through lever 102 and the support 16 through slide 18. Because of the shape of the notch 121 of the link and the compound movement -of link 120, the notch 121 momentarily disengages from the ton-gue 1121A of the do-g 97 there-by allowing spring 126 to return the dog into engagement with cam 94. Substantially simulltaneously the spring 130 returns the link 120 into interengagement with the dog 121, after it has reengaged the surface of the cam 94 and the cam has substantially completed one revolution. By this means the cam may be actuated one revolution at a time upon each downward motion of the linking arms 113.

The sequential operation of the various elements may be controlled by conventional mechanisms such for eX- ample as the type shown in my copending patent application, Serial No. 224,81ll, led September 19, 1962, now abandoned, or as schematically illustrated in FIG, 7. The operation of the mechanism may be controlled through a foot pedal which actuates the hydraulic valve 142 on downward movement.

This valve 142 controls the flow of hydraulic uid through pump 141 which in turn is actuated by motor 143. On actuation fluid is pumped through a sequence valve 144 which causes the sequential operation of hydraulic cylinder 11 and then hydraulic cylinder 20. Hydraulic cylinder 11 when actuated `drives shaft 12 upwardly causing the last engaging member 10 to move downwardly to firmly engage a last over a member. The last and member should have been placed, just prior thereto, by an operator, respectively over and in the support 16. The cylinder 20 is then actuated to drive the ram upwardly and to thereby cause nails in the holes 22B to be driven through the member into the partially formed shoe on the last. On downward movement of the shaft 21, linking arm 114 is engaged .to sequentially actuate the nail transfer mechanism 30, nail feed mechanism 80 and support 16 in a manner hereinbefore described. In this sequence the support moves the arms rearwardly from above the block 22, the nail transfer mechanism deposits nails in holes 22B, returns, and then receives a fresh group in tube 43 from the nail feed mechanism and lthe support 16 thereafter moves forwardly over block 22.

The machine described is particularly useful in a unique process of attaching dutchmans, rands, spring heel wedgies, heel bases or other similar members to the lasted upper and insole of a shoe while positioned on a last. In conventional techniques for attaching such members it is usual to perforate the member about its periphery and thereafter drive cut nails singularly and in series through the perforations, the counter, the upper and the insole to join them together. In the present invention a member is used without any preformed perforations. A last having a lasted upper and insole on it is located over support 16 and is heldin this position by the operator. The drive shaft 6 moves downwardly, on actuation of the foot pedal 140, with the heel portion of the last engaging member 20E (FIG. 8). The nails 41 suitably arrayed preferably in a horseshoe arrangement, are thereupon `driven upwardly through actuation 0f the shaft 21. These nails perforate the member 20E, the upper 151, the counter 152, the insole 153 and are impacted with sufficient force against the metal plate 155 of the last 156 to bend over as illustrated at 157 and thereby interengage the insole, upper, and member with all the nails 41 being `driven in gang fashion into the insole at substantially the same time. A wire nail 41 as illustrated in FIG. 9 must be used in order to perforate the member 20E without the requirement of preformed holes. This wire nail 41 is provided with a diamond point 159 having long tapered faces 160 and is adapted upon impacting against the metal plate 155 of the last to bend in the tapered area with substantial uniformity from nail to nail.

What is claimed is:

1. In a nailing mechanism a means for nailing members to a partially completed shoe on a last having a metal heel plate comprising,

(a) nail `driving means for driving a group of nails upwardly in a group comprising a die block having a plurality of upwardly extending holes, a plurality of cylindrical nail driversv positioned each with an end in said holes and a driver plate supporting said cylindrical nail drivers,

(b) means for actuating (a) comprising a ram like member positioned for reciprocal movement below and engaging said driver plate and power means engaging said ram like member for movement of said ram like means upwardly,

(c) means for securing a member above said nail driving means comprising a clamping mechanism having a pair of opposed arms adapted to grip said member, block means pivotally supporting said arms, and means including a slide member supporting said block means for reciprocal movement whereby said arms may be moved in a horizontal direction to and from a position in vertical alignment with (a),

(d) means for securing a metal heel last having a partially completed shoe above a member in (c) comprising a drive shaft, journal means supporting said shaft for vertical reciprocal movement with holder means detachably securing said last to the lower end of said shaft,

(e) means for selectively aligning a metal heel last carried by (d) in vertical adjacent alignment with a member secured by (c) and with nails positioned in said holes of (a) Comprising a common drive source, a clutch mechanism for engaging said common drive source, a lever linkage mechanism connected at one end to said slide member of (c), and interconnected at the other through said clutch mechanism to said common drive source, said linkage mechanism adapted on actuation to move said slide member to and from an aligned position in which members .carried by said clamping mechanism are positioned intermediate and in Vertical alignment with said metal heel last and said nails,

(f) nail feed `mechanism and nail transfer mechanism for feeding nails sequentially in groups to said holes of said nail driving means with the pointed ends of said nails directed upwardly,

(g) means for actuating (f) .comprising a lever mechanism engaging (f) at one end and connected through said clutch mechanism to said common drive source at the other end, for reciprocating (f) to and from an aligned position with said nail feed mechanism positioned in vertical alignment with (a),

(h) means for synchronizing (e) and (g) whereby nails will be fed to (a), then` (c) and (d) will be positioned above (a) on actuation of (a) by (b), comprising actuating means interengaged with (b) for actuation on movement of said ram like member, said actuating means interlinked with said clutch mechanism for operatively engaging said clutch mechanism for a selected interval with said common drive source, whereby said nail transfer mechanism Will rst be cycled into and from said aligned position to position nails in said holes, then said slide member will be positioned into said aligned position to receive a member by said common drive source.

2. A mechanism as set forth in claim 1 wherein said clutch mechanism includes a one-revolution clutch having friction engageable portions with one portion operatively connected to said common drive source with said common drive source adapted for constant operation and said other portion connected to said nail feed mechanism, nail transfer mechanism, and said slide member.

3. A mechanism as set forth in claim 2 having hydraulic drive means for actuating said ram like member and said drive shaft of (a) with means for lowering said drive shaft before actuation of said ram like member.

4. A mechanism as set forth in claim 2 wherein said nail transfer mechaism includes a housing having a plurality of vertically extending holes adapted to receive nails, a retaining plate positioned below and slideable with respect to said housing to and from a position closing the bottom of said holes, and means for sliding said retaining plate from said closing position on movement of said housing into said aligned position.

No references cited.

GRANVILLE Y. CUSTER, JR., Primary Examiner. 

1. IN A NAILING MECHANISM A MEANS FOR NAILING MEMBERS TO A PARTIALLY COMPLETED SHOE ON A LAST HAVING A METAL HEEL PLATE COMPRISING, (A) NAIL DRIVING MEANS FOR DRIVING A GROUP OF NAILS UPWARDLY IN A GROUP COMPRISING A DIE BLOCK HAVING A PLURALITY OF UPWARDLY EXTENDING HOLES, A PLURALITY OF CYLINDRICAL NAIL DRIVERS POSITIONED EACN WITH AN END IN SAID HOLES AND A DRIVER PLATE SUPPORTING SAID CYLINDRICAL NAIL DRIVERS, (B) MEANS FOR ACTUATING (A) COMPRISING A RAM LIKE MEMBER POSITIONED FOR RECIPROCAL MOVEMENT BELOW AND ENGAGING SAID DRIVER PLATE AND POWER MEANS ENGAGING SAID RAM LIKE MEMBER FOR MOVEMENT OF SAID RAM LIKE MEANS UPWARDLY, (C) MEANS FOR SECURING A MEMBER ABOVE SAID NAIL DRIVING MEANS COMPRISING A CLAMPING MECHANISM HAVING A PAIR OF OPPOSED ARMS ADAPTED TO GRIP SAID MEMBER, BLOCK MEANS PIVOTALLY SUPPORTING SAID ARMS, AND MEANS INCLUDING A SLIDE MEMBER SUPPORTING SAID BLOCK MEANS FOR RECIPROCAL MOVEMENT WHEREBY SAID ARMS MAY BE MOVED IN A HORIZONTAL DIRECTION TO AND FROM A POSITION IN VERTICAL ALIGNMENT WITH (A), (D) MEANS FOR SECURING A METAL HEEL LAST HAVING A PARTIALLY COMPLETED SHOE ABOVE A MEMBER IN (C) COMPRISING A DRIVE SHAFT, JOURNAL MEANS SUPPORTING SAID SHAFT FOR VERTICAL RECIPROCAL MOVEMENT WITH HOLDER MEANS DETACHABLY SECURING SAID LAST TO THE LOWER END OF SAID SHAFT, (E) MEANS FOR SELECTIVELY ALIGNING A METAL HEEL LAST CARRIED BY (D) IN VERTICAL ADJACENT ALIGNMENT WITH A MEMBER SECURED BY (C) AND WITH NAILS POSITIONED IN SAID HOLES OF (A) COMPRISING A COMMON DRIVE SOURCE, A CLUTCH MECHANISM FOR ENGAGING SAID COM- 